Britain's Andy Murray celebrated his rise to world number one by beating American John Isner 6-3 6-7 (4-7) 6-4 to win the Paris Masters.
The victory was Murray's sixth ATP title of a memorable 2016.
The Scot, 29, also added his second Olympic and Wimbledon titles on his way to the top of the rankings.
He will be officially confirmed as Britain's first singles number one since computerised rankings were introduced in 1973 on Monday.
More to follow.